A251797 Number of (n+1)X(4+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

36552, 3352272, 294088336, 26787273856, 2446811684440, 224175608341756, 20552060379396424, 1884978485974990408, 172902962249484086342, 15861042034905778115252, 1455015754461632248883532

Offset: 1

Author

R. H. Hardin, Dec 09 2014

Keywords

• nonn

Comments

Column 4 of A251801

Examples

			Some solutions for n=1
..1..0..2..3..1....2..0..1..0..2....1..2..1..3..2....2..1..2..2..2
..0..2..0..0..2....0..2..1..3..1....0..2..3..1..2....0..1..1..2..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210